ceph-osd: adds crush_device_class config option

This is used with the lvm osd scenario. When using devices you need the
option to set the crush device class for all of the OSDs that are
created from those devices.

Signed-off-by: Andrew Schoen <aschoen@redhat.com>

roles/ceph-osd/defaults/main.yml

@@ -217,6 +217,7 @@ bluestore_wal_devices: "{{ dedicated_devices }}"
 #   - data: /dev/sdb1
 
 lvm_volumes: []
+crush_device_class: ""
 
 
 ##########

roles/ceph-osd/tasks/scenarios/lvm-batch.yml

@@ -6,6 +6,7 @@
     objectstore: "{{ osd_objectstore }}"
     batch_devices: "{{ devices }}"
     dmcrypt: "{{ dmcrypt|default(omit) }}"
+    crush_device_class: "{{ crush_device_class|default(omit) }}"
     action: "batch"
   environment:
     CEPH_VOLUME_DEBUG: 1